NORMAL EXTENSION
Normal extension occurs in two phases:
PHASE 1 – NLG and MLG EXTENDING
When the pilot moves the LGCL to DOWN position, the NOSE, LH and RH
amber lights on the LGCP illuminate because the LGCL is DOWN while the
LG is not DOWN and LOCKED.
With LGCL at DOWN, the VALVE 2 DOWN solenoid energizes and pressure
from the hydraulic system no.2 is delivered to the NLG and MLG retraction
actuators to retract.